Bottle-cap.



No. 876,149. PATENTED JAN. '7, 1908. G. W. COOK.

BOTTLE GAP.

APPLICATION FILED APB-6,1907.

/6 lllllllll- /A Muses CHARLES W. COOK, OF EVANSVILLE, INDIANA.

BOTTLE-CAP.

Specification of Letters Patent.

Patented Jan. 7, 1908.

Application filed April 5. 1907- Serial No. 366.541.

To all whom it may concern:

Be it known that I, CHARLES W. OooK, a citizen of the United States,residing at Evansville, county of Vanderburg, and State of Indiana, haveinvented certain new and useful Im rovernentsin Bottle-Caps, of whichthe fol owing is a specification.

My invention relates to bottle caps.

The ordinary bottle cap comprising a metal shell ada ted to be crimpedaround the mouth of t e bottle and a cork disk within said shell, isuite defective in that it permits leakage, which is largely due to thefact that the cork disk does not properly seal the mouth of the bottle.

A further defect of the ordinary bottle cap is that the shell issufficiently springv so that it does not properly hold itself on thebottle mouth, which also permits leakage.

The present invention seeks to remedy the foregoing defects by theprovision of a bottle cap having a shell provided with an off-set artwhich greatly strengthens the shell and, urther, by. the rovision, inconnection with the improved siiell, of a gasket located between theoff-set part of the shell and the crimped glart thereof adapted to bearagainst the mout of the bottle when the ca is applied and to be expandedby the app ication of the cap to the bottle and thereby made to veryclosely conform to the bottle mouth and produce a perfectly air-tightjoint.

In carrying out the invention, I'provide a bottle cap shell having acentral circular depressed or off-set part which defines a groove orchannel between itself and the crimped part of the-ca and seat withinthe said channel, a plia le gasket, the s ec ific construction and arranement of suc parts being set forth in detai hereinafter.

n the accompanying drawings: Figure 1 is a section of a bottle equippedwith my improved cap;- Fig. 2, a detail plan of the cap; Fig. 3, asectlon through the cap; Fig. 4, a bottom view of the cap; Fig. 5,details of the asket and Fig. 6, details of the facing.

The neck of an ordinary bottle is shown at 1, the same having the usualbead 2 at its mouth so that the cap may be crimped therearound.

The metal cap or shell 3 differs from those heretofore used in that itis provided with a central circular depression or off-set part 4, whichhas aninner inclined wall 5 defimn between said wall and the crimpedpart 6 o the shell or cap, a circular channel or groove 7.

Seated within the channel 7 is a gasket 8 of rubber or other soft andpliable material which is preferably provided with an annular ring orfacing 9. This facing 9 is of tin-foil or sheeting. The facing 9 may bedispensed with if desired.

Normally the gasket 8 is of such width that it does not quite fill thechannel 7, but when the cap is ap lied to the mouth of the bottle andcrimpe around the bead 2, the bead 2 by its pressure against the gasket8, expands it so that it conforms perfectly to the inner wall of thecrimped wall 6 and to the wall 5' and also tothe bead 2, the arts beingso constructed that a portion 0 I the gasket is forced against the innersurface of the bead 2. t

The depressed or off set part 4 gives the cap relatlvely enormousstrength and prevents buckling and this insures a tight fit on thebottle mouth and prevents leakage or entrance of air in its associationwith the gasket 8, which forms an air-tight joint or seal with the mouthof the bottle.

The pliability of the covering 9, if used,

causes 1t to conform erfectly to every point of the surface of the ead2.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent,-is:

A bottle cap consisting of a shell having a depressed central part, anouter circular wall ada ted to be crim ed around the mouth of the ottle,said wal and de ressed part defining an intermediate annular channel,and an annular expansible asket lying in said channel and of less widtTithan-said channel which is adapted to be expanded by the action ofcrimping the ca on the bottle to form a seal, exposed to the uid withinthe bottle, between the cap and bottle month.

In testimony whereof, I hereunto affix my signature in presence of twowitnesses.

CHARLES W. COOK.

